package collections;

import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

public class SetOperations {

    public static void main(String[] args){
        Set<String> set1 = new HashSet<>();
        Collections.addAll(set1,("A B C D E F G H I J K L").split(" "));
        set1.add("M");
        System.out.println("H:"+set1.contains("H"));
        System.out.println("H:"+set1.contains("N"));

    }
}
